and from miscellaneous sources. The "unrelated" marriages from
genealogies, are marriages of brothers and sisters of the persons who
have married first cousins, and their records were obtained from the
same sources as those in the next previous category. The "children of
first cousins" are the offspring of the first cousin marriages who
married persons not related to themselves by blood. The last category
includes distantly related marriages from correspondence and other
sources and marriages between persons of the same surname whose
relationship could not be traced.

TABLE XIII.
------------------------------------------------------------------
| | Sex of Children. |
|Number |-----------------------|Mascu-
Marriages. |Fertile.| Male.|Female.|Unknown.|linity.
------------------------------------------------------------------
1st cousin. Gene. | 125 | 318 | 314 | 40 | 101
Unrelated. Gene. | 629 | 1561 | 1559 | 64 | 100
Ch. of 1st cousins. Gene.| 170 | 402 | 375 | 48 | 107
Other cousin. Gene. | 301 | 736 | 666 | 15 | 111
1st Cousin. Cor. | 150 | 316 | 295 | 148 | 107
Ch. of 1st cousins. Cor. | 124 | 192 | 164 | 214 | 111
Miscellaneous | 88 | 210 | 205 | 50 | 102
------------------------------------------------------------------
Total | 1587 | 3735 | 3578 | 578 | 104.4
------------------------------------------------------------------

It is of course impossible to explain all the ratios in this table.
Much variation is here due to chance, and a few additional cases might
appreciably change any of the ratios. It will be noticed, however,
that the two categories whose masculinity is most similar (100 and
101), are derived from cases taken from the same families and from the
same environment, and differing only in that the first is closely
consanguineous while the second is not. The third and fourth groups,
separated from the first two by at least a generation, and probably
living in a different environment, differ greatly in masculinity from
them. In the fourth group are included 1-1/2, second, third, and a few
even more distant cousins, all more distantly related than first
cousins, and taken from the same genealogies as these; yet the
masculinity is much greater.

An analysis of the cas